I slept with my Best friend and loved it. He has a girlfriend, they were poly at the time. And now they are not. I talked to her about it because they ended the poly part of their relationship the day we had sex and I was worried it was becuase he told her and she no longer wanted me in his life, even as a friend so I wanted to reassure her I was okay just being his friend again, becuase he means the world to me. It turns out she didn't know and she freaked out on him and now he's pissed at me. I hope to God that we can get over this.